package com.dong.servlet.User;

import com.dong.pojo.User;
import com.dong.service.User.UserService;
import com.dong.service.User.UserServiceImpl;
import com.dong.util.Constants;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class UserLoginServlet extends HttpServlet {

    //控制层，调用业务层
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("UserLoginServlet --->start...");
        //获取用户名和密码
        String userCode = req.getParameter("userCode");
        String userPassword = req.getParameter("userPassword");

        //和数据库中的用户名和密码进行对比，调用业务层
        UserService userService = new UserServiceImpl();
        User user = userService.Login(userCode, userPassword);

        if(user != null){
            //将用户的信息存到Session中
            req.getSession().setAttribute(Constants.USER_SESSION,user);
            //跳转到主页
            resp.sendRedirect("jsp/frame.jsp");
        }else{
            //转发回登录页面，提示登录密码或者用户名错误
            req.setAttribute("error","用户名或密码错误！");
            req.getRequestDispatcher("login.jsp").forward(req,resp);
        }
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}
